Dr. Peter Arner, Karolinska Institutet (image) Karolinska Institutet Caption Dr. Peter Arner, Ph.D., is a Professor of Medicine at Karolinska Institutet in Stockholm, Sweden. Credit Stefan Zimmerman Usage Restrictions This image may only be used in connection to media reports about Dr. Arner's research at Karolinska Institutet. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.